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Re: [mpi-21] Proposal EH2: add const keyword to the C bindings

To: mpi-21@xxxxxxxxxxxxx
Subject: Re: [mpi-21] Proposal EH2: add const keyword to the C bindings
From: Patrick Geoffray <patrick@xxxxxxxx>
Date: Wed, 09 Jan 2008 15:53:23 -0500
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Erez Haba wrote:

This issue is related to the "send buffer access". I say "wait, let's make it right for the users by restricting the implementers".

I agree with Erez, common sense is that a send is a read-only operation. Furthermore, the implementer's interest in not respecting this common sense is not obvious at all, an extra copy is a reasonable overhead when supporting heterogeneous configurations.

I am not fond of adding const to the C bindings as it could introduce portability issues regarding compilers. I would prefer to simply change the standard to allow overlapping sends and read access to send buffers.

Patrick

References:
- RE: [mpi-21] Proposal EH2: add const keyword to the C bindings
  - From: Erez Haba
- RE: [mpi-21] Proposal EH2: add const keyword to the C bindings
  - From: Richard Treumann
- Re: [mpi-21] Proposal EH2: add const keyword to the C bindings
  - From: Dries Kimpe
- RE: [mpi-21] Proposal EH2: add const keyword to the C bindings
  - From: Supalov, Alexander
- RE: [mpi-21] Proposal EH2: add const keyword to the C bindings
  - From: Erez Haba
- RE: [mpi-21] Proposal EH2: add const keyword to the C bindings
  - From: Supalov, Alexander
- RE: [mpi-21] Proposal EH2: add const keyword to the C bindings
  - From: Erez Haba

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